Irvine Air Quality in February
Across 2019–2025, Irvine's February air quality had a median AQI of 62 (Moderate) over 198 monitored days in the Los Angeles-Long Beach-Anaheim, CA area. 0.5% of February days (1 of 198) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 80.3% of days. The cleanest February on record here was 2019 (median AQI 55, 0 days above 100) and the worst was 2025 (median 63, 1 day above 100, peak AQI 103).
- Good: 13.1%
- Moderate: 86.4%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
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How is the air in Irvine in February?
Moderate on a typical day: median AQI 62 across 2019–2025, with 0.5% of February days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓13.1% of February days were Good (AQI 0–50), 86.4% Moderate (51–100).
- ✓1 day of 198 reached AQI 101+; the February peak was 103.
- ✓Best February: 2019; worst February: 2025.
Frequently asked questions
What is the air quality like in Irvine in February?▾
Across 2019–2025, the median daily AQI in Irvine in February was 62 (Moderate). 13.1% of days were Good, 86.4% Moderate, and 0.5% reached Unhealthy for Sensitive Groups or worse, based on 198 monitored days in EPA's Air Quality System.
Is February a good time for outdoor exercise in Irvine?▾
A typical February day in Irvine is Moderate (median AQI 62): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of February days reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Irvine's February air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 80.3% of February days in Irvine. The highest February AQI recorded in 2019–2025 was 103 (Unhealthy for Sensitive Groups), in 2025.
Irvine February air quality, year by year
Irvine February air quality by year (Los Angeles-Long Beach-Anaheim, CA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019cleanest | 28 | 55 | 0 | 70 | PM2.5 |
| 2020 | 29 | 66 | 0 | 85 | PM2.5 |
| 2021 | 28 | 63 | 0 | 96 | PM2.5 |
| 2022 | 28 | 68 | 0 | 95 | PM2.5 |
| 2023 | 28 | 63 | 0 | 97 | PM2.5 |
| 2024 | 29 | 56 | 0 | 85 | PM2.5 |
| 2025worst | 28 | 63 | 1 | 103 | PM2.5 |
What February air means in Irvine
A typical February day in Irvine is Moderate (median AQI 62): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of February days reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
February's median AQI of 62 is below Irvine's whole-year median of 74, making it one of the area's cleaner periods. Nationally, the median February AQI across every EPA metro area (87,428 metro-days, 2019–2025) is 41, so Irvine runs above the national February norm; 0.5% of its February days topped AQI 100 versus 0.4% nationally (about the same).
February is part of Irvine's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Irvine
The latest EPA AirNow observation puts Irvine's AQI at 48 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Irvine air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Los Angeles-Long Beach-Anaheim, CA), 2019–2025. Daily AQI per CBSA is the highest AQI reported by any monitor in the area that day; the defining parameter is the pollutant that set it. Month and season statistics pool every such day in the period across all years listed. Retrieved 2026-09-09.